Posted by Dave in GA on March 18, 2011 at 14:59:51 from (163.246.18.120):
Perhaps someone has the answer to this one. I drive a 1992 Chevy Suburban with a 350 and throttle body and 4-speed auto trans. After the engine's warmed up, if I accelerate slowly, easy on the gas, the vehicle starts to shake. It feels as though it's starved for fuel, or some sensor is confused. It gets worse as the vehicle approaches the point of having to upshift. After I get out onto a highway, it feels like it's running fine. When I start the vehicle with a cold engine, it runs fine. It's after the engine warms up when the problems start. I keep it tuned up. What do I need to replace? Someone said the EGR valve, but I had a new one put on a few years ago. The oxygen sensor is almost new. This problem has baffled the mechanics that I normally use. It's been happening for a few years and getting worse.
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